op 	 {
  name: "ParallelConcat"
  input_arg {
    name: "values"
    type_attr: "T"
    number_attr: "N"
  }
  output_arg {
    name: "output"
    type_attr: "T"
  }
  attr {
    name: "N"
    type: "int"
    has_minimum: true
    minimum: 1
  }
  attr {
    name: "T"
    type: "type"
  }
  attr {
    name: "shape"
    type: "shape"
  }
}
